After positioning the strips, let them stand for about half an hour. Then roll over the wallpaper seams with a steam roller or rubber brayer. Don’t roll with too much pressure or the glue will seep out from under the seam.
If you are hanging foil, fabric, or embossed wall coverings, don’t roll the seams but gently tap the seams with your smoothing brush or sponge. After rolling the seams, use clear water and a clean sponge to rinse the glue from the surface of the wallpaper. Do not use water on embossed or fabric wall coverings.
Hanging subsequent strips: Take the wallpaper roll and find where the pattern matches with the previously hung strip. You may have to cut off quite a bit of excess paper in order to get the strips to match. Measure with your yardstick to make several marks on the wall, as you did for the first strip.
Place the wallpaper on the wall and match the patterns. Then, measure and cut, adding about 2” excess on each end. Repeat the previous instructions to hang the strip.
You may face common wallpaper quandaries, such as papering around an inside corner, around windows and doors, around appliances or light fixtures, or on ceilings.
A professional finish: When the wallpaper is completely hung and the paste is dried, you can apply a thin line of clear silicon caulking with a caulking gun (which looks like a large syringe). Apply caulk at the edged areas such as baseboards, chair and plate rails, and tiles (if wallpapering a bathroom or kitchen).
While this step is not essential, it does ensure that the paper will not unravel and curl up at a later date. It is quite easy to do and gives the papering job a professional, clean finish.